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NetBSD/sys/ufs/ffs/ffs_vfsops.c

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/* $NetBSD: ffs_vfsops.c,v 1.87 2001/09/15 20:36:42 chs Exp $ */
/*
* Copyright (c) 1989, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ffs_vfsops.c 8.31 (Berkeley) 5/20/95
*/
#if defined(_KERNEL_OPT)
#include "opt_ffs.h"
#include "opt_quota.h"
#include "opt_compat_netbsd.h"
#include "opt_softdep.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/socket.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/mbuf.h>
#include <sys/file.h>
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/lock.h>
#include <sys/sysctl.h>
#include <miscfs/specfs/specdev.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufs_extern.h>
#include <ufs/ufs/ufs_bswap.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
/* how many times ffs_init() was called */
int ffs_initcount = 0;
extern struct lock ufs_hashlock;
extern struct vnodeopv_desc ffs_vnodeop_opv_desc;
extern struct vnodeopv_desc ffs_specop_opv_desc;
extern struct vnodeopv_desc ffs_fifoop_opv_desc;
const struct vnodeopv_desc * const ffs_vnodeopv_descs[] = {
&ffs_vnodeop_opv_desc,
&ffs_specop_opv_desc,
&ffs_fifoop_opv_desc,
NULL,
};
struct vfsops ffs_vfsops = {
MOUNT_FFS,
ffs_mount,
ufs_start,
ffs_unmount,
ufs_root,
ufs_quotactl,
ffs_statfs,
ffs_sync,
ffs_vget,
ffs_fhtovp,
ffs_vptofh,
ffs_init,
ffs_reinit,
ffs_done,
ffs_sysctl,
ffs_mountroot,
ufs_check_export,
ffs_vnodeopv_descs,
};
struct genfs_ops ffs_genfsops = {
ffs_gop_size,
ffs_gop_alloc,
genfs_gop_write,
};
struct pool ffs_inode_pool;
/*
* Called by main() when ffs is going to be mounted as root.
*/
int
ffs_mountroot()
{
struct fs *fs;
struct mount *mp;
struct proc *p = curproc; /* XXX */
struct ufsmount *ump;
int error;
if (root_device->dv_class != DV_DISK)
return (ENODEV);
/*
* Get vnodes for rootdev.
*/
if (bdevvp(rootdev, &rootvp))
panic("ffs_mountroot: can't setup bdevvp's");
if ((error = vfs_rootmountalloc(MOUNT_FFS, "root_device", &mp))) {
vrele(rootvp);
return (error);
}
if ((error = ffs_mountfs(rootvp, mp, p)) != 0) {
mp->mnt_op->vfs_refcount--;
vfs_unbusy(mp);
free(mp, M_MOUNT);
vrele(rootvp);
return (error);
}
simple_lock(&mountlist_slock);
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
simple_unlock(&mountlist_slock);
ump = VFSTOUFS(mp);
fs = ump->um_fs;
memset(fs->fs_fsmnt, 0, sizeof(fs->fs_fsmnt));
(void)copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0);
(void)ffs_statfs(mp, &mp->mnt_stat, p);
vfs_unbusy(mp);
inittodr(fs->fs_time);
return (0);
}
/*
* VFS Operations.
*
* mount system call
*/
int
ffs_mount(mp, path, data, ndp, p)
struct mount *mp;
const char *path;
void *data;
struct nameidata *ndp;
struct proc *p;
{
struct vnode *devvp;
struct ufs_args args;
struct ufsmount *ump = NULL;
struct fs *fs;
size_t size;
int error, flags;
mode_t accessmode;
error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args));
if (error)
return (error);
#if !defined(SOFTDEP)
mp->mnt_flag &= ~MNT_SOFTDEP;
#endif
/*
* If updating, check whether changing from read-only to
* read/write; if there is no device name, that's all we do.
*/
if (mp->mnt_flag & MNT_UPDATE) {
ump = VFSTOUFS(mp);
fs = ump->um_fs;
if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
flags = WRITECLOSE;
if (mp->mnt_flag & MNT_FORCE)
flags |= FORCECLOSE;
if (mp->mnt_flag & MNT_SOFTDEP)
error = softdep_flushfiles(mp, flags, p);
else
error = ffs_flushfiles(mp, flags, p);
if (error == 0 &&
ffs_cgupdate(ump, MNT_WAIT) == 0 &&
fs->fs_clean & FS_WASCLEAN) {
if (mp->mnt_flag & MNT_SOFTDEP)
fs->fs_flags &= ~FS_DOSOFTDEP;
fs->fs_clean = FS_ISCLEAN;
(void) ffs_sbupdate(ump, MNT_WAIT);
}
if (error)
return (error);
fs->fs_ronly = 1;
fs->fs_fmod = 0;
}
/*
* Flush soft dependencies if disabling it via an update
* mount. This may leave some items to be processed,
* so don't do this yet XXX.
*/
if ((fs->fs_flags & FS_DOSOFTDEP) &&
!(mp->mnt_flag & MNT_SOFTDEP) && fs->fs_ronly == 0) {
#ifdef notyet
flags = WRITECLOSE;
if (mp->mnt_flag & MNT_FORCE)
flags |= FORCECLOSE;
error = softdep_flushfiles(mp, flags, p);
if (error == 0 && ffs_cgupdate(ump, MNT_WAIT) == 0)
fs->fs_flags &= ~FS_DOSOFTDEP;
(void) ffs_sbupdate(ump, MNT_WAIT);
#elif defined(SOFTDEP)
mp->mnt_flag |= MNT_SOFTDEP;
#endif
}
/*
* When upgrading to a softdep mount, we must first flush
* all vnodes. (not done yet -- see above)
*/
if (!(fs->fs_flags & FS_DOSOFTDEP) &&
(mp->mnt_flag & MNT_SOFTDEP) && fs->fs_ronly == 0) {
#ifdef notyet
flags = WRITECLOSE;
if (mp->mnt_flag & MNT_FORCE)
flags |= FORCECLOSE;
error = ffs_flushfiles(mp, flags, p);
#else
mp->mnt_flag &= ~MNT_SOFTDEP;
#endif
}
if (mp->mnt_flag & MNT_RELOAD) {
error = ffs_reload(mp, ndp->ni_cnd.cn_cred, p);
if (error)
return (error);
}
if (fs->fs_ronly && (mp->mnt_flag & MNT_WANTRDWR)) {
/*
* If upgrade to read-write by non-root, then verify
* that user has necessary permissions on the device.
*/
devvp = ump->um_devvp;
if (p->p_ucred->cr_uid != 0) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_ACCESS(devvp, VREAD | VWRITE,
p->p_ucred, p);
VOP_UNLOCK(devvp, 0);
if (error)
return (error);
}
fs->fs_ronly = 0;
fs->fs_clean <<= 1;
fs->fs_fmod = 1;
if ((fs->fs_flags & FS_DOSOFTDEP)) {
error = softdep_mount(devvp, mp, fs,
p->p_ucred);
if (error)
return (error);
}
}
if (args.fspec == 0) {
/*
* Process export requests.
*/
return (vfs_export(mp, &ump->um_export, &args.export));
}
if ((mp->mnt_flag & (MNT_SOFTDEP | MNT_ASYNC)) ==
(MNT_SOFTDEP | MNT_ASYNC)) {
printf("%s fs uses soft updates, ignoring async mode\n",
fs->fs_fsmnt);
mp->mnt_flag &= ~MNT_ASYNC;
}
}
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
if ((error = namei(ndp)) != 0)
return (error);
devvp = ndp->ni_vp;
if (devvp->v_type != VBLK) {
vrele(devvp);
return (ENOTBLK);
}
if (major(devvp->v_rdev) >= nblkdev) {
vrele(devvp);
return (ENXIO);
}
/*
* If mount by non-root, then verify that user has necessary
* permissions on the device.
*/
if (p->p_ucred->cr_uid != 0) {
accessmode = VREAD;
if ((mp->mnt_flag & MNT_RDONLY) == 0)
accessmode |= VWRITE;
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p);
VOP_UNLOCK(devvp, 0);
if (error) {
vrele(devvp);
return (error);
}
}
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
error = ffs_mountfs(devvp, mp, p);
if (!error) {
ump = VFSTOUFS(mp);
fs = ump->um_fs;
if ((mp->mnt_flag & (MNT_SOFTDEP | MNT_ASYNC)) ==
(MNT_SOFTDEP | MNT_ASYNC)) {
printf("%s fs uses soft updates, "
"ignoring async mode\n",
fs->fs_fsmnt);
mp->mnt_flag &= ~MNT_ASYNC;
}
}
}
else {
if (devvp != ump->um_devvp)
error = EINVAL; /* needs translation */
else
vrele(devvp);
}
if (error) {
vrele(devvp);
return (error);
}
(void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
memset(fs->fs_fsmnt + size, 0, sizeof(fs->fs_fsmnt) - size);
memcpy(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN);
(void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
&size);
memset(mp->mnt_stat.f_mntfromname + size, 0, MNAMELEN - size);
if (mp->mnt_flag & MNT_SOFTDEP)
fs->fs_flags |= FS_DOSOFTDEP;
else
fs->fs_flags &= ~FS_DOSOFTDEP;
if (fs->fs_fmod != 0) { /* XXX */
fs->fs_fmod = 0;
if (fs->fs_clean & FS_WASCLEAN)
fs->fs_time = time.tv_sec;
else
printf("%s: file system not clean (fs_clean=%x); please fsck(8)\n",
mp->mnt_stat.f_mntfromname, fs->fs_clean);
(void) ffs_cgupdate(ump, MNT_WAIT);
}
return (0);
}
/*
* Reload all incore data for a filesystem (used after running fsck on
* the root filesystem and finding things to fix). The filesystem must
* be mounted read-only.
*
* Things to do to update the mount:
* 1) invalidate all cached meta-data.
* 2) re-read superblock from disk.
* 3) re-read summary information from disk.
* 4) invalidate all inactive vnodes.
* 5) invalidate all cached file data.
* 6) re-read inode data for all active vnodes.
*/
int
ffs_reload(mountp, cred, p)
struct mount *mountp;
struct ucred *cred;
struct proc *p;
{
struct vnode *vp, *nvp, *devvp;
struct inode *ip;
void *space;
struct buf *bp;
struct fs *fs, *newfs;
struct partinfo dpart;
int i, blks, size, error;
int32_t *lp;
caddr_t cp;
if ((mountp->mnt_flag & MNT_RDONLY) == 0)
return (EINVAL);
/*
* Step 1: invalidate all cached meta-data.
*/
devvp = VFSTOUFS(mountp)->um_devvp;
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, 0, cred, p, 0, 0);
VOP_UNLOCK(devvp, 0);
if (error)
panic("ffs_reload: dirty1");
/*
* Step 2: re-read superblock from disk.
*/
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0)
size = DEV_BSIZE;
else
size = dpart.disklab->d_secsize;
error = bread(devvp, (ufs_daddr_t)(SBOFF / size), SBSIZE, NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
fs = VFSTOUFS(mountp)->um_fs;
newfs = malloc(fs->fs_sbsize, M_UFSMNT, M_WAITOK);
memcpy(newfs, bp->b_data, fs->fs_sbsize);
#ifdef FFS_EI
if (VFSTOUFS(mountp)->um_flags & UFS_NEEDSWAP) {
ffs_sb_swap((struct fs*)bp->b_data, newfs);
fs->fs_flags |= FS_SWAPPED;
}
#endif
if (newfs->fs_magic != FS_MAGIC || newfs->fs_bsize > MAXBSIZE ||
newfs->fs_bsize < sizeof(struct fs)) {
brelse(bp);
free(newfs, M_UFSMNT);
return (EIO); /* XXX needs translation */
}
/*
* Copy pointer fields back into superblock before copying in XXX
* new superblock. These should really be in the ufsmount. XXX
* Note that important parameters (eg fs_ncg) are unchanged.
*/
newfs->fs_csp = fs->fs_csp;
newfs->fs_maxcluster = fs->fs_maxcluster;
newfs->fs_contigdirs = fs->fs_contigdirs;
newfs->fs_ronly = fs->fs_ronly;
memcpy(fs, newfs, (u_int)fs->fs_sbsize);
if (fs->fs_sbsize < SBSIZE)
bp->b_flags |= B_INVAL;
brelse(bp);
free(newfs, M_UFSMNT);
mountp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
ffs_oldfscompat(fs);
/* An old fsck may have zeroed these fields, so recheck them. */
if (fs->fs_avgfilesize <= 0)
fs->fs_avgfilesize = AVFILESIZ;
if (fs->fs_avgfpdir <= 0)
fs->fs_avgfpdir = AFPDIR;
ffs_statfs(mountp, &mountp->mnt_stat, p);
/*
* Step 3: re-read summary information from disk.
*/
blks = howmany(fs->fs_cssize, fs->fs_fsize);
space = fs->fs_csp;
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
#ifdef FFS_EI
if (UFS_FSNEEDSWAP(fs))
ffs_csum_swap((struct csum *)bp->b_data,
(struct csum *)space, size);
else
#endif
memcpy(space, bp->b_data, (size_t)size);
space = (char *)space + size;
brelse(bp);
}
if ((fs->fs_flags & FS_DOSOFTDEP))
softdep_mount(devvp, mountp, fs, cred);
/*
* We no longer know anything about clusters per cylinder group.
*/
if (fs->fs_contigsumsize > 0) {
lp = fs->fs_maxcluster;
for (i = 0; i < fs->fs_ncg; i++)
*lp++ = fs->fs_contigsumsize;
}
loop:
simple_lock(&mntvnode_slock);
for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) {
if (vp->v_mount != mountp) {
simple_unlock(&mntvnode_slock);
goto loop;
}
nvp = vp->v_mntvnodes.le_next;
/*
* Step 4: invalidate all inactive vnodes.
*/
if (vrecycle(vp, &mntvnode_slock, p))
goto loop;
/*
* Step 5: invalidate all cached file data.
*/
simple_lock(&vp->v_interlock);
simple_unlock(&mntvnode_slock);
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK))
goto loop;
if (vinvalbuf(vp, 0, cred, p, 0, 0))
panic("ffs_reload: dirty2");
/*
* Step 6: re-read inode data for all active vnodes.
*/
ip = VTOI(vp);
error = bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
(int)fs->fs_bsize, NOCRED, &bp);
if (error) {
brelse(bp);
vput(vp);
return (error);
}
cp = (caddr_t)bp->b_data +
(ino_to_fsbo(fs, ip->i_number) * DINODE_SIZE);
#ifdef FFS_EI
if (UFS_FSNEEDSWAP(fs))
ffs_dinode_swap((struct dinode *)cp,
&ip->i_din.ffs_din);
else
#endif
memcpy(&ip->i_din.ffs_din, cp, DINODE_SIZE);
ip->i_ffs_effnlink = ip->i_ffs_nlink;
brelse(bp);
vput(vp);
simple_lock(&mntvnode_slock);
}
simple_unlock(&mntvnode_slock);
return (0);
}
/*
* Common code for mount and mountroot
*/
int
ffs_mountfs(devvp, mp, p)
struct vnode *devvp;
struct mount *mp;
struct proc *p;
{
struct ufsmount *ump;
struct buf *bp;
struct fs *fs;
dev_t dev;
struct partinfo dpart;
void *space;
int blks;
int error, i, size, ronly;
#ifdef FFS_EI
int needswap;
#endif
int32_t *lp;
struct ucred *cred;
u_int64_t maxfilesize; /* XXX */
u_int32_t sbsize;
dev = devvp->v_rdev;
cred = p ? p->p_ucred : NOCRED;
/*
* Disallow multiple mounts of the same device.
* Disallow mounting of a device that is currently in use
* (except for root, which might share swap device for miniroot).
* Flush out any old buffers remaining from a previous use.
*/
if ((error = vfs_mountedon(devvp)) != 0)
return (error);
if (vcount(devvp) > 1 && devvp != rootvp)
return (EBUSY);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, V_SAVE, cred, p, 0, 0);
VOP_UNLOCK(devvp, 0);
if (error)
return (error);
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p);
if (error)
return (error);
if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, cred, p) != 0)
size = DEV_BSIZE;
else
size = dpart.disklab->d_secsize;
bp = NULL;
ump = NULL;
error = bread(devvp, (ufs_daddr_t)(SBOFF / size), SBSIZE, cred, &bp);
if (error)
goto out;
fs = (struct fs*)bp->b_data;
if (fs->fs_magic == FS_MAGIC) {
sbsize = fs->fs_sbsize;
#ifdef FFS_EI
needswap = 0;
} else if (fs->fs_magic == bswap32(FS_MAGIC)) {
sbsize = bswap32(fs->fs_sbsize);
needswap = 1;
#endif
} else {
error = EINVAL;
goto out;
}
if (sbsize > MAXBSIZE || sbsize < sizeof(struct fs)) {
error = EINVAL;
goto out;
}
fs = malloc((u_long)sbsize, M_UFSMNT, M_WAITOK);
memcpy(fs, bp->b_data, sbsize);
#ifdef FFS_EI
if (needswap) {
ffs_sb_swap((struct fs*)bp->b_data, fs);
fs->fs_flags |= FS_SWAPPED;
}
#endif
ffs_oldfscompat(fs);
if (fs->fs_bsize > MAXBSIZE || fs->fs_bsize < sizeof(struct fs)) {
error = EINVAL;
goto out;
}
/* make sure cylinder group summary area is a reasonable size. */
if (fs->fs_cgsize == 0 || fs->fs_cpg == 0 ||
fs->fs_ncg > fs->fs_ncyl / fs->fs_cpg + 1 ||
fs->fs_cssize >
fragroundup(fs, fs->fs_ncg * sizeof(struct csum))) {
error = EINVAL; /* XXX needs translation */
goto out2;
}
/* XXX updating 4.2 FFS superblocks trashes rotational layout tables */
if (fs->fs_postblformat == FS_42POSTBLFMT && !ronly) {
error = EROFS; /* XXX what should be returned? */
goto out2;
}
ump = malloc(sizeof *ump, M_UFSMNT, M_WAITOK);
memset((caddr_t)ump, 0, sizeof *ump);
ump->um_fs = fs;
if (fs->fs_sbsize < SBSIZE)
bp->b_flags |= B_INVAL;
brelse(bp);
bp = NULL;
fs->fs_ronly = ronly;
if (ronly == 0) {
fs->fs_clean <<= 1;
fs->fs_fmod = 1;
}
size = fs->fs_cssize;
blks = howmany(size, fs->fs_fsize);
if (fs->fs_contigsumsize > 0)
size += fs->fs_ncg * sizeof(int32_t);
size += fs->fs_ncg * sizeof(*fs->fs_contigdirs);
space = malloc((u_long)size, M_UFSMNT, M_WAITOK);
fs->fs_csp = space;
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
error = bread(devvp, fsbtodb(fs, fs->fs_csaddr + i), size,
cred, &bp);
if (error) {
free(fs->fs_csp, M_UFSMNT);
goto out2;
}
#ifdef FFS_EI
if (needswap)
ffs_csum_swap((struct csum *)bp->b_data,
(struct csum *)space, size);
else
#endif
memcpy(space, bp->b_data, (u_int)size);
space = (char *)space + size;
brelse(bp);
bp = NULL;
}
if (fs->fs_contigsumsize > 0) {
fs->fs_maxcluster = lp = space;
for (i = 0; i < fs->fs_ncg; i++)
*lp++ = fs->fs_contigsumsize;
space = lp;
}
size = fs->fs_ncg * sizeof(*fs->fs_contigdirs);
fs->fs_contigdirs = space;
space = (char *)space + size;
memset(fs->fs_contigdirs, 0, size);
/* Compatibility for old filesystems - XXX */
if (fs->fs_avgfilesize <= 0)
fs->fs_avgfilesize = AVFILESIZ;
if (fs->fs_avgfpdir <= 0)
fs->fs_avgfpdir = AFPDIR;
mp->mnt_data = (qaddr_t)ump;
mp->mnt_stat.f_fsid.val[0] = (long)dev;
mp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_FFS);
mp->mnt_maxsymlinklen = fs->fs_maxsymlinklen;
mp->mnt_fs_bshift = fs->fs_bshift;
mp->mnt_dev_bshift = DEV_BSHIFT; /* XXX */
mp->mnt_flag |= MNT_LOCAL;
#ifdef FFS_EI
if (needswap)
ump->um_flags |= UFS_NEEDSWAP;
#endif
ump->um_mountp = mp;
ump->um_dev = dev;
ump->um_devvp = devvp;
ump->um_nindir = fs->fs_nindir;
ump->um_lognindir = ffs(fs->fs_nindir) - 1;
ump->um_bptrtodb = fs->fs_fsbtodb;
ump->um_seqinc = fs->fs_frag;
for (i = 0; i < MAXQUOTAS; i++)
ump->um_quotas[i] = NULLVP;
devvp->v_specmountpoint = mp;
ump->um_savedmaxfilesize = fs->fs_maxfilesize; /* XXX */
maxfilesize = (u_int64_t)0x80000000 * fs->fs_bsize - 1; /* XXX */
if (fs->fs_maxfilesize > maxfilesize) /* XXX */
fs->fs_maxfilesize = maxfilesize; /* XXX */
if (ronly == 0 && (fs->fs_flags & FS_DOSOFTDEP)) {
error = softdep_mount(devvp, mp, fs, cred);
if (error) {
free(fs->fs_csp, M_UFSMNT);
goto out;
}
}
return (0);
out2:
free(fs, M_UFSMNT);
out:
devvp->v_specmountpoint = NULL;
if (bp)
brelse(bp);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, cred, p);
VOP_UNLOCK(devvp, 0);
if (ump) {
free(ump, M_UFSMNT);
mp->mnt_data = (qaddr_t)0;
}
return (error);
}
/*
* Sanity checks for old file systems.
*
* XXX - goes away some day.
*/
int
ffs_oldfscompat(fs)
struct fs *fs;
{
int i;
fs->fs_npsect = max(fs->fs_npsect, fs->fs_nsect); /* XXX */
fs->fs_interleave = max(fs->fs_interleave, 1); /* XXX */
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
fs->fs_nrpos = 8; /* XXX */
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
u_int64_t sizepb = fs->fs_bsize; /* XXX */
/* XXX */
fs->fs_maxfilesize = fs->fs_bsize * NDADDR - 1; /* XXX */
for (i = 0; i < NIADDR; i++) { /* XXX */
sizepb *= NINDIR(fs); /* XXX */
fs->fs_maxfilesize += sizepb; /* XXX */
} /* XXX */
fs->fs_qbmask = ~fs->fs_bmask; /* XXX */
fs->fs_qfmask = ~fs->fs_fmask; /* XXX */
} /* XXX */
return (0);
}
/*
* unmount system call
*/
int
ffs_unmount(mp, mntflags, p)
struct mount *mp;
int mntflags;
struct proc *p;
{
struct ufsmount *ump;
struct fs *fs;
int error, flags;
flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
if (mp->mnt_flag & MNT_SOFTDEP) {
if ((error = softdep_flushfiles(mp, flags, p)) != 0)
return (error);
} else {
if ((error = ffs_flushfiles(mp, flags, p)) != 0)
return (error);
}
ump = VFSTOUFS(mp);
fs = ump->um_fs;
if (fs->fs_ronly == 0 &&
ffs_cgupdate(ump, MNT_WAIT) == 0 &&
fs->fs_clean & FS_WASCLEAN) {
if (mp->mnt_flag & MNT_SOFTDEP)
fs->fs_flags &= ~FS_DOSOFTDEP;
fs->fs_clean = FS_ISCLEAN;
(void) ffs_sbupdate(ump, MNT_WAIT);
}
if (ump->um_devvp->v_type != VBAD)
ump->um_devvp->v_specmountpoint = NULL;
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_CLOSE(ump->um_devvp, fs->fs_ronly ? FREAD : FREAD|FWRITE,
NOCRED, p);
vput(ump->um_devvp);
free(fs->fs_csp, M_UFSMNT);
free(fs, M_UFSMNT);
free(ump, M_UFSMNT);
mp->mnt_data = (qaddr_t)0;
mp->mnt_flag &= ~MNT_LOCAL;
return (error);
}
/*
* Flush out all the files in a filesystem.
*/
int
ffs_flushfiles(mp, flags, p)
struct mount *mp;
int flags;
struct proc *p;
{
extern int doforce;
struct ufsmount *ump;
int error;
if (!doforce)
flags &= ~FORCECLOSE;
ump = VFSTOUFS(mp);
#ifdef QUOTA
if (mp->mnt_flag & MNT_QUOTA) {
int i;
if ((error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) != 0)
return (error);
for (i = 0; i < MAXQUOTAS; i++) {
if (ump->um_quotas[i] == NULLVP)
continue;
quotaoff(p, mp, i);
}
/*
* Here we fall through to vflush again to ensure
* that we have gotten rid of all the system vnodes.
*/
}
#endif
/*
* Flush all the files.
*/
error = vflush(mp, NULLVP, flags);
if (error)
return (error);
/*
* Flush filesystem metadata.
*/
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_FSYNC(ump->um_devvp, p->p_ucred, FSYNC_WAIT, 0, 0, p);
VOP_UNLOCK(ump->um_devvp, 0);
return (error);
}
/*
* Get file system statistics.
*/
int
ffs_statfs(mp, sbp, p)
struct mount *mp;
struct statfs *sbp;
struct proc *p;
{
struct ufsmount *ump;
struct fs *fs;
ump = VFSTOUFS(mp);
fs = ump->um_fs;
if (fs->fs_magic != FS_MAGIC)
panic("ffs_statfs");
#ifdef COMPAT_09
sbp->f_type = 1;
#else
sbp->f_type = 0;
#endif
sbp->f_bsize = fs->fs_fsize;
sbp->f_iosize = fs->fs_bsize;
sbp->f_blocks = fs->fs_dsize;
sbp->f_bfree = fs->fs_cstotal.cs_nbfree * fs->fs_frag +
fs->fs_cstotal.cs_nffree;
sbp->f_bavail = (long) (((u_int64_t) fs->fs_dsize * (u_int64_t)
(100 - fs->fs_minfree) / (u_int64_t) 100) -
(u_int64_t) (fs->fs_dsize - sbp->f_bfree));
sbp->f_files = fs->fs_ncg * fs->fs_ipg - ROOTINO;
sbp->f_ffree = fs->fs_cstotal.cs_nifree;
if (sbp != &mp->mnt_stat) {
memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN);
memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN);
}
strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
return (0);
}
/*
* Go through the disk queues to initiate sandbagged IO;
* go through the inodes to write those that have been modified;
* initiate the writing of the super block if it has been modified.
*
* Note: we are always called with the filesystem marked `MPBUSY'.
*/
int
ffs_sync(mp, waitfor, cred, p)
struct mount *mp;
int waitfor;
struct ucred *cred;
struct proc *p;
{
struct vnode *vp, *nvp;
struct inode *ip;
struct ufsmount *ump = VFSTOUFS(mp);
struct fs *fs;
int error, allerror = 0;
fs = ump->um_fs;
if (fs->fs_fmod != 0 && fs->fs_ronly != 0) { /* XXX */
printf("fs = %s\n", fs->fs_fsmnt);
panic("update: rofs mod");
}
/*
* Write back each (modified) inode.
*/
simple_lock(&mntvnode_slock);
loop:
for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) {
/*
* If the vnode that we are about to sync is no longer
* associated with this mount point, start over.
*/
if (vp->v_mount != mp)
goto loop;
simple_lock(&vp->v_interlock);
nvp = LIST_NEXT(vp, v_mntvnodes);
ip = VTOI(vp);
if (vp->v_type == VNON ||
((ip->i_flag &
(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFIED | IN_ACCESSED)) == 0 &&
LIST_EMPTY(&vp->v_dirtyblkhd) &&
vp->v_uobj.uo_npages == 0))
{
simple_unlock(&vp->v_interlock);
continue;
}
simple_unlock(&mntvnode_slock);
error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK);
if (error) {
simple_lock(&mntvnode_slock);
if (error == ENOENT)
goto loop;
continue;
}
if ((error = VOP_FSYNC(vp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0, p)) != 0)
allerror = error;
vput(vp);
simple_lock(&mntvnode_slock);
}
simple_unlock(&mntvnode_slock);
/*
* Force stale file system control information to be flushed.
*/
if (waitfor != MNT_LAZY) {
if (ump->um_mountp->mnt_flag & MNT_SOFTDEP)
waitfor = MNT_NOWAIT;
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
if ((error = VOP_FSYNC(ump->um_devvp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0, p)) != 0)
allerror = error;
VOP_UNLOCK(ump->um_devvp, 0);
}
#ifdef QUOTA
qsync(mp);
#endif
/*
* Write back modified superblock.
*/
if (fs->fs_fmod != 0) {
fs->fs_fmod = 0;
fs->fs_time = time.tv_sec;
if ((error = ffs_cgupdate(ump, waitfor)))
allerror = error;
}
return (allerror);
}
/*
* Look up a FFS dinode number to find its incore vnode, otherwise read it
* in from disk. If it is in core, wait for the lock bit to clear, then
* return the inode locked. Detection and handling of mount points must be
* done by the calling routine.
*/
int
ffs_vget(mp, ino, vpp)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
{
struct fs *fs;
struct inode *ip;
struct ufsmount *ump;
struct buf *bp;
struct vnode *vp;
dev_t dev;
int error;
caddr_t cp;
ump = VFSTOUFS(mp);
dev = ump->um_dev;
if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL)
return (0);
/* Allocate a new vnode/inode. */
if ((error = getnewvnode(VT_UFS, mp, ffs_vnodeop_p, &vp)) != 0) {
*vpp = NULL;
return (error);
}
/*
* If someone beat us to it while sleeping in getnewvnode(),
* push back the freshly allocated vnode we don't need, and return.
*/
do {
if ((*vpp = ufs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) {
ungetnewvnode(vp);
return (0);
}
} while (lockmgr(&ufs_hashlock, LK_EXCLUSIVE|LK_SLEEPFAIL, 0));
/*
* XXX MFS ends up here, too, to allocate an inode. Should we
* XXX create another pool for MFS inodes?
*/
ip = pool_get(&ffs_inode_pool, PR_WAITOK);
memset(ip, 0, sizeof(struct inode));
vp->v_data = ip;
ip->i_vnode = vp;
ip->i_fs = fs = ump->um_fs;
ip->i_dev = dev;
ip->i_number = ino;
LIST_INIT(&ip->i_pcbufhd);
#ifdef QUOTA
{
int i;
for (i = 0; i < MAXQUOTAS; i++)
ip->i_dquot[i] = NODQUOT;
}
#endif
/*
* Put it onto its hash chain and lock it so that other requests for
* this inode will block if they arrive while we are sleeping waiting
* for old data structures to be purged or for the contents of the
* disk portion of this inode to be read.
*/
ufs_ihashins(ip);
lockmgr(&ufs_hashlock, LK_RELEASE, 0);
/* Read in the disk contents for the inode, copy into the inode. */
error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)),
(int)fs->fs_bsize, NOCRED, &bp);
if (error) {
/*
* The inode does not contain anything useful, so it would
* be misleading to leave it on its hash chain. With mode
* still zero, it will be unlinked and returned to the free
* list by vput().
*/
vput(vp);
brelse(bp);
*vpp = NULL;
return (error);
}
cp = (caddr_t)bp->b_data + (ino_to_fsbo(fs, ino) * DINODE_SIZE);
#ifdef FFS_EI
if (UFS_FSNEEDSWAP(fs))
ffs_dinode_swap((struct dinode *)cp, &ip->i_din.ffs_din);
else
#endif
memcpy(&ip->i_din.ffs_din, cp, DINODE_SIZE);
if (DOINGSOFTDEP(vp))
softdep_load_inodeblock(ip);
else
ip->i_ffs_effnlink = ip->i_ffs_nlink;
brelse(bp);
/*
* Initialize the vnode from the inode, check for aliases.
* Note that the underlying vnode may have changed.
*/
ufs_vinit(mp, ffs_specop_p, ffs_fifoop_p, &vp);
/*
* Finish inode initialization now that aliasing has been resolved.
*/
genfs_node_init(vp, &ffs_genfsops);
ip->i_devvp = ump->um_devvp;
VREF(ip->i_devvp);
/*
* Ensure that uid and gid are correct. This is a temporary
* fix until fsck has been changed to do the update.
*/
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
ip->i_ffs_uid = ip->i_din.ffs_din.di_ouid; /* XXX */
ip->i_ffs_gid = ip->i_din.ffs_din.di_ogid; /* XXX */
} /* XXX */
uvm_vnp_setsize(vp, ip->i_ffs_size);
*vpp = vp;
return (0);
}
/*
* File handle to vnode
*
* Have to be really careful about stale file handles:
* - check that the inode number is valid
* - call ffs_vget() to get the locked inode
* - check for an unallocated inode (i_mode == 0)
* - check that the given client host has export rights and return
* those rights via. exflagsp and credanonp
*/
int
ffs_fhtovp(mp, fhp, vpp)
struct mount *mp;
struct fid *fhp;
struct vnode **vpp;
{
struct ufid *ufhp;
struct fs *fs;
ufhp = (struct ufid *)fhp;
fs = VFSTOUFS(mp)->um_fs;
if (ufhp->ufid_ino < ROOTINO ||
ufhp->ufid_ino >= fs->fs_ncg * fs->fs_ipg)
return (ESTALE);
return (ufs_fhtovp(mp, ufhp, vpp));
}
/*
* Vnode pointer to File handle
*/
/* ARGSUSED */
int
ffs_vptofh(vp, fhp)
struct vnode *vp;
struct fid *fhp;
{
struct inode *ip;
struct ufid *ufhp;
ip = VTOI(vp);
ufhp = (struct ufid *)fhp;
ufhp->ufid_len = sizeof(struct ufid);
ufhp->ufid_ino = ip->i_number;
ufhp->ufid_gen = ip->i_ffs_gen;
return (0);
}
void
ffs_init()
{
if (ffs_initcount++ > 0)
return;
softdep_initialize();
ufs_init();
pool_init(&ffs_inode_pool, sizeof(struct inode), 0, 0, 0, "ffsinopl",
0, pool_page_alloc_nointr, pool_page_free_nointr, M_FFSNODE);
}
void
ffs_reinit()
{
softdep_reinitialize();
ufs_reinit();
}
void
ffs_done()
{
if (--ffs_initcount > 0)
return;
/* XXX softdep cleanup ? */
ufs_done();
pool_destroy(&ffs_inode_pool);
}
int
ffs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
struct proc *p;
{
extern int doasyncfree;
extern int ffs_log_changeopt;
/* all sysctl names at this level are terminal */
if (namelen != 1)
return (ENOTDIR); /* overloaded */
switch (name[0]) {
case FFS_ASYNCFREE:
return (sysctl_int(oldp, oldlenp, newp, newlen, &doasyncfree));
case FFS_LOG_CHANGEOPT:
return (sysctl_int(oldp, oldlenp, newp, newlen,
&ffs_log_changeopt));
default:
return (EOPNOTSUPP);
}
/* NOTREACHED */
}
/*
* Write a superblock and associated information back to disk.
*/
int
ffs_sbupdate(mp, waitfor)
struct ufsmount *mp;
int waitfor;
{
struct fs *fs = mp->um_fs;
struct buf *bp;
int i, error = 0;
int32_t saved_nrpos = fs->fs_nrpos;
int64_t saved_qbmask = fs->fs_qbmask;
int64_t saved_qfmask = fs->fs_qfmask;
u_int64_t saved_maxfilesize = fs->fs_maxfilesize;
u_int8_t saveflag;
/* Restore compatibility to old file systems. XXX */
if (fs->fs_postblformat == FS_42POSTBLFMT) /* XXX */
fs->fs_nrpos = -1; /* XXX */
if (fs->fs_inodefmt < FS_44INODEFMT) { /* XXX */
int32_t *lp, tmp; /* XXX */
/* XXX */
lp = (int32_t *)&fs->fs_qbmask; /* XXX nuke qfmask too */
tmp = lp[4]; /* XXX */
for (i = 4; i > 0; i--) /* XXX */
lp[i] = lp[i-1]; /* XXX */
lp[0] = tmp; /* XXX */
} /* XXX */
fs->fs_maxfilesize = mp->um_savedmaxfilesize; /* XXX */
bp = getblk(mp->um_devvp, SBOFF >> (fs->fs_fshift - fs->fs_fsbtodb),
(int)fs->fs_sbsize, 0, 0);
saveflag = fs->fs_flags & FS_INTERNAL;
fs->fs_flags &= ~FS_INTERNAL;
memcpy(bp->b_data, fs, fs->fs_sbsize);
#ifdef FFS_EI
if (mp->um_flags & UFS_NEEDSWAP)
ffs_sb_swap(fs, (struct fs*)bp->b_data);
#endif
fs->fs_flags |= saveflag;
fs->fs_nrpos = saved_nrpos; /* XXX */
fs->fs_qbmask = saved_qbmask; /* XXX */
fs->fs_qfmask = saved_qfmask; /* XXX */
fs->fs_maxfilesize = saved_maxfilesize; /* XXX */
if (waitfor == MNT_WAIT)
error = bwrite(bp);
else
bawrite(bp);
return (error);
}
int
ffs_cgupdate(mp, waitfor)
struct ufsmount *mp;
int waitfor;
{
struct fs *fs = mp->um_fs;
struct buf *bp;
int blks;
void *space;
int i, size, error = 0, allerror = 0;
allerror = ffs_sbupdate(mp, waitfor);
blks = howmany(fs->fs_cssize, fs->fs_fsize);
space = fs->fs_csp;
for (i = 0; i < blks; i += fs->fs_frag) {
size = fs->fs_bsize;
if (i + fs->fs_frag > blks)
size = (blks - i) * fs->fs_fsize;
bp = getblk(mp->um_devvp, fsbtodb(fs, fs->fs_csaddr + i),
size, 0, 0);
#ifdef FFS_EI
if (mp->um_flags & UFS_NEEDSWAP)
ffs_csum_swap((struct csum*)space,
(struct csum*)bp->b_data, size);
else
#endif
memcpy(bp->b_data, space, (u_int)size);
space = (char *)space + size;
if (waitfor == MNT_WAIT)
error = bwrite(bp);
else
bawrite(bp);
}
if (!allerror && error)
allerror = error;
return (allerror);
}
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